The following is an excerpt from Omichi no joshiki [Tenrikyo Fundamentals] (pp. 116–120) by Koji Sato, professor at Tenri University and instructor at Tenri Seminary. Note: This translation is a provisional one at the moment and may require further revision.
All Days Are Lucky Days
In Japan today it is customary to plan a wedding on an auspicious day and avoid certain days that are considered unlucky. The same goes for funerals, as certain days are considered inappropriate. Such long-held customs emerged when the Chinese calendar that was brought to Japan took on a life of its own and began to regulate the lives of the Japanese people.